<?php
/*
 * This file is part of SwiftMailer.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Utility Class allowing users to simply check expressions again Swift Grammar.
 *
 * @package Swift
 * @author  Xavier De Cock <xdecock@gmail.com>
 */
class Swift_Validate
{
	/**
	 * Grammar Object
	 *
	 * @var Swift_Mime_Grammar
	 */
	private static $grammar = null;

	/**
	 * Checks if an e-mail address matches the current grammars.
	 *
	 * @param string $email
	 *
	 * @return boolean
	 */
	public static function email($email)
	{
		if (self::$grammar === null) {
			self::$grammar = Swift_DependencyContainer::getInstance()
				->lookup('mime.grammar');
		}

		return preg_match(
			'/^' . self::$grammar->getDefinition('addr-spec') . '$/D',
			$email
		);
	}
}
